NXP Semiconductors 74LV14PW/AUJ

Overview

74LV14PW/AUJ from Nexperia is a low-voltage CMOS hex inverting Schmitt trigger IC, pin- and function-compatible with 74HC14 and 74HCT14. It provides six independent hysteresis-equipped inverters capable of converting slow-rising/falling input signals into clean, jitter-free digital outputs. Key confirmed parameters include 1.0 V to 5.5 V supply range, -40 °C to +125 °C operating temperature, and TSSOP14 (SOT402-1) package with 14 terminals.

For engineers reviewing the 74LV14PW/AUJ datasheet, 74LV14PW/AUJ pinout, 74LV14PW/AUJ application, or 74LV14PW/AUJ equivalent, this page delivers verified functional identity, Schmitt-trigger hysteresis behavior, propagation delay (13 ns typical at 3.3 V), output drive capability (±12 mA), and direct substitution guidance for noise-immune signal conditioning in industrial control and sensor interface circuits.

Technical Context

The 74LV14PW/AUJ implements six independent CMOS inverting buffers, each incorporating asymmetric input hysteresis (VT+ and VT−) to reject noise on slow-transitioning signals. Its Schmitt-trigger inputs provide defined positive-going (e.g., 1.2 V min at VCC = 2.0 V) and negative-going (e.g., 0.3 V min at VCC = 2.0 V) switching thresholds, yielding hysteresis voltage (VH) up to 1.5 V at 5.5 V supply.

It operates across a wide supply range (1.0–5.5 V), supports TTL-level inputs when VCC is 2.7–3.6 V, and maintains specified static and dynamic performance over -40 °C to +125 °C. Propagation delay varies with supply voltage: 20 ns max at 2.7 V, 22 ns max at 3.0–3.6 V, and 23 ns max at -40 °C to +125 °C ambient.

Key Specifications

Pinout & Package

TSSOP14 package (SOT402-1): plastic thin shrink small outline, 14-lead, body width 4.4 mm, 0.65 mm pitch, exposed pad optional (non-functional).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar hex inverting Schmitt trigger applications.

Compared with 74LV14PW/AUJ, 74HC14PW lacks ultra-low-voltage support below 2.0 V, while SN74LV14APW offers identical functionality with alternate manufacturer qualification-making the Nexperia part optimal for 1.0–3.6 V portable and industrial designs requiring guaranteed low-VCC operation.

Availability

74LV14PW/AUJ is available at Aetrix Electronics and suitable for industrial automation, sensor signal conditioning, and embedded timing circuits requiring stable component supply across extended temperature ranges and mixed-voltage platforms.

Supply support for 74LV14PW/AUJ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Nexperia is a global semiconductor expert focused on high-volume, high-reliability logic, analog, and discrete components, with leadership in automotive-grade and industrial-standard devices.

The 74LV14PW/AUJ belongs to Nexperia's LV logic family, designed specifically for energy-efficient, noise-immune digital interfacing in battery-powered, industrial, and mixed-supply applications where robust Schmitt-trigger behavior is essential.

FAQ

What is the minimum supply voltage at which 74LV14PW/AUJ guarantees full functionality?

The 74LV14PW/AUJ guarantees full static and dynamic functionality down to 1.0 V supply voltage, with input thresholds and output drive specified across the entire 1.0–5.5 V range. At VCC = 1.2 V, VT+ is typically 1.2 V and VOL remains ≤0.40 V at 6 mA sink current - enabling use in ultra-low-power sensor nodes and energy-harvesting systems where other logic families fail to operate.

Does 74LV14PW/AUJ support TTL-level inputs, and under what conditions?

Yes, 74LV14PW/AUJ accepts standard TTL input voltage levels (0.8 V VIH min, 0.4 V VIL max) when VCC is between 2.7 V and 3.6 V. This allows direct connection to legacy 5 V TTL outputs without level-shifting, provided the device's supply is set within that window - a key advantage over standard LVCMOS buffers lacking TTL compatibility.

How does the hysteresis behavior of 74LV14PW/AUJ improve noise immunity compared to standard inverters?

The 74LV14PW/AUJ features asymmetric hysteresis: VT+ (e.g., 1.60 V typ at 3.0 V) and VT− (e.g., 1.05 V typ at 3.0 V) differ by VH ≈ 0.55 V. This creates a 550 mV noise margin window - any noise spike smaller than VH cannot cause unintended output toggling, unlike standard inverters with zero hysteresis that misfire on sub-threshold transients.

Can 74LV14PW/AUJ be used to build a relaxation oscillator, and what determines its frequency?

Yes, 74LV14PW/AUJ is commonly used in two-inverter relaxation oscillators (e.g., Fig. 12). Frequency depends on external R and C values and the device's intrinsic VT+ and VT− thresholds: f ≈ 1 / (2.2 × R × C). At VCC = 3.3 V, typical VT+ = 1.6 V and VT− = 1.05 V yield predictable, stable oscillation without external comparators or op-amps.

Is the exposed thermal pad on the TSSOP14 package of 74LV14PW/AUJ electrically functional?

No - the exposed pad on the 74LV14PW/AUJ's SOT402-1 (TSSOP14) package is non-functional and has no electrical connection. Per Nexperia's datasheet (Section 6.1), it may remain floating or be connected to VCC if soldered, but it serves only mechanical and thermal purposes and must not be tied to GND or other potentials.